Gorgar was my first playfield I attempted to touch up and restore myself. I had a blast with it. It was a great learning experience for me. Vids the man that will point you on the right path. Here is the thread of my "restore".I use that term loosely.

http://pinside.com/pinball/forum/topic/my-first-playfield-restore-gorgar

You can do it!

Brian

My playfield had many areas like that. No matter how much I scrubbed, the ball swirls would not come out. I even ended up removing some of the paint by being too aggressive. The guy I got it from never changed the ball and he had the machine for 20 years.

Brian